PRAGUE -- Czech police say they have arrested a man who allegedly made threats against Wimbledon champion Petra Kvitova.

Police spokeswoman Gabriela Holcakova said Friday that a 23-year-old Czech made the threats against "a publicly known person" in a phone call to an unspecified other person on Thursday. Holcakova would not confirm Czech media reports that the targeted person was Kvitova.

Kvitova's spokesman Karel Tejkal said nobody had threatened the tennis player directly, but added: "Police did a great job."

Holcakova said the man, who was not identified, was arrested as police considered the threats serious.

The incident follows criticism of Kvitova, including from a member of parliament, for moving from the Czech Republic to Monaco to avoid higher taxation.

Kvitova beat Canada's Eugenie Bouchard on Saturday for her second Wimbledon title.